New-type Light Steel Prefabricated House

The new-type light steel prefabricated house is a low-rise residential building system with light steel keels cold-rolled from hot-dip galvanized aluminum steel strips as its core material. It offers advantages such as lightweight construction, efficient construction, and earthquake and wind resistance, but attention should be paid to sound insulation, thermal insulation, and rust prevention.

Core Materials and Structural Characteristics This building uses light steel keels cold-rolled from hot-dip galvanized aluminum steel strips as its framework. The galvanized aluminum-zinc steel plate is formed by solidifying a quaternary crystal composed of 55% aluminum, 43.4% zinc, and 1.6% silicon at a high temperature of 600℃, creating a dense anti-corrosion barrier that effectively resists corrosion in humid environments. The main structure adopts standardized modular technology, with a self-weight only 1/5 to 1/8 of that of traditional brick-and-mortar structures, significantly reducing the load on the foundation.

Performance Advantages

1. Strong Earthquake and Wind Resistance: The light steel keels are connected by bolts to form a flexible structure, with a main earthquake resistance rating of Grade 9 and the ability to withstand strong winds of up to Grade 12, making it suitable for earthquake-prone areas and coastal regions.
2. High Construction Efficiency: Factory-prefabricated components are assembled on-site, reducing the construction period by 50% compared to traditional buildings, lowering material waste to 3%, and reducing overall costs by 15%-20%.
3. Outstanding Energy Efficiency: The exterior walls are filled with glass fiber wool for efficient thermal insulation, and are equipped with breathable membranes to regulate humidity; the roofing system supports the integration of photovoltaic tiles, improving energy efficiency by 40%.
4. High Decorative Flexibility: Exterior wall decorations can be selected from materials such as metal carved panels and cement fiber hanging panels, meeting diverse aesthetic needs.

Application Scenarios and Policy Support This building system is widely used in rural housing, tourist resorts, and overseas projects. Twenty-eight provinces have introduced subsidy policies for prefabricated buildings, promoting the large-scale development of the industry.

Usage Precautions

1. Sound Insulation Issues: The sound insulation performance of light steel structures is slightly inferior to that of brick-and-mortar structures, and improvements can be made by adding sound insulation cotton or double-layer walls.
2. Thermal Insulation Needs: In summer, additional thermal insulation layers (such as reflective films or extra insulation boards) should be installed to enhance thermal comfort.
3. Material Quality Control: The thickness of the steel should be strictly inspected to prevent merchants from substituting 0.6mm thin materials for the standard 1.0mm materials; in humid southern regions, galvanized aluminum-zinc steel plates with a coating thickness of ≥120g/㎡ should be selected to prevent rusting.
4. Construction Supervision: It is necessary to supervise the construction team to install connection nodes according to specifications to prevent structural instability caused by shoddy workmanship.